From: Richard Henderson <r...@redhat.com>
Date: Tue, 01 Nov 2011 13:48:26 -0700
> (2) Can we have the kernel implement some {SWAP,CAS}{4,8} primitives (possibly
> via a special trap) that we can export from libgcc, as we do for ARM, PA,
> & SH?
>
> I believe that would allow all of the non-embedded linux to support all of
> the c++11 atomic operations without having to resort to spinlocks.
Yes, I was just looking into this right now. I didn't realize that PA, SH,
and ARM had added these kernel hooks to solve this problem.
